US4427280A - Auxiliary power source device for motor driven camera - Google Patents
Auxiliary power source device for motor driven camera Download PDFInfo
- Publication number
- US4427280A US4427280A US06/349,458 US34945882A US4427280A US 4427280 A US4427280 A US 4427280A US 34945882 A US34945882 A US 34945882A US 4427280 A US4427280 A US 4427280A
- Authority
- US
- United States
- Prior art keywords
- power source
- auxiliary power
- motor
- motor driven
- driven camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/42—Interlocking between shutter operation and advance of film or change of plate or cut-film
- G03B17/425—Interlocking between shutter operation and advance of film or change of plate or cut-film motor drive cameras
Definitions
- the present invention relates to an auxiliary power source device for the motor driven camera in which the motor driven device is built or on which it is mounted in order to increase the film winding speed.
- I consumed current
- ⁇ rotation torque
- V power source voltage
- C 1 -C 4 constant
- N speed.
- the U.S. Pat. No. 3,853,396 discloses a method in accordance to which the auxiliary power source is connected in series to the driving power source.
- the auxiliary power source is only connected in series to the driving power source, as is clear from (2) only V becomes large and the curve B in FIGS. 1(a) and (b) is translated parallely so that the curve when the auxiliary power source is used becomes D (output torque-speed characteristics).
- the starting torque (when the speed is 0) is increased from ⁇ 1 up to ⁇ 2
- the starting current is increased from I 1 up to I 2 .
- the starting torque is increased so that when the auxiliary power source is used a too high torque is applied to the film when a predetermined number of pictures have been taken with the result that the film is often damaged, which is inconvenient.
- the starting current is also increased so that the motor control switch, the transistors and so on for large current have to be used in the motor driven camera with the result that the manufacturing cost of the motor driven camera increases while its size becomes also large.
- the no-load speed N 2 is also increased so that, as mentioned above, the no-load speed ranging from 10,000-15,000 r.p.m. which is achieved by the driving power source alone is increased further when the auxiliary power source is used, and this shortens the life of the motor and often damages it, which is inconvenient.
- a motor with governer has been proposed, whereby the motor is complicated in the construction so that the manufacturing cost is high and there easily takes place damage, which is inconvenient.
- An object of the present invention is to prevent the increase of the starting torque and the starting current of the motor when the auxiliary power source is used, by providing a means for lowering the output of the auxiliary power source when the output current of the auxiliary power source reaches a predetermined value.
- Another object of the present invention is to check the increase of the no-load speed.
- FIGS. 1(a) and (b) show the characteristic curve of a DC motor for explaining the operation of the present invention.
- FIG. 2 shows an embodiment of the present invention in perspective view for showing the motor driven camera and the auxiliary power source device in a concrete way.
- FIG. 3 shows the current supply circuit of the motor driven camera and the auxiliary power source device shown in FIG. 2.
- FIG. 4 shows a second embodiment of the present invention in perspective view for showing the mount portion of the motor driven camera and the auxiliary power source device in a concrete way.
- FIG. 5 shows the current supply circuit of the motor driven camera and the auxiliary power source device shown in FIG. 4.
- FIG. 2 shows the motor driven camera and the auxiliary power source device.
- 1 is the camera in which the winding motor and the power source are built in such a manner that the winding motion can be done with the motor.
- 2 is the tripod screw arranged on the bottom surface of the motor driven surface
- 3 is the guide hole
- 4 is the movable pin
- 5 and 6 are the terminals to be connected to the auxiliary power source device.
- 7 is the auxiliary power source device in which the auxiliary power source and the power source control circuit are built
- 8 is the mounting screw for mounting the device on the motor driven camera
- 9 is the guide pin
- 10 is the fixed pin
- 11 and 12 are the terminals to be electrically connected to the terminals 5 and 6 of the motor driven camera respectively.
- 13 is the driving motor in the motor driven camera, whose driving is controlled by means of the motor control circuit 14.
- 15 is the driving power source in the motor driven camera for supplying the power to the motor 13 and the control circuit 14 through the switch 16 for the driving power source.
- the switch is normally in the opened state and closed when the movable pin 4 is depressed, whereby the terminals 5 and 6 are arranged at the both ends of the switch 16.
- the above-mentioned elements are arranged in the motor driven camera 1.
- the auxiliary power source device 7 the auxiliary power source is arranged. Between the positive side of the auxiliary power source 17 and the terminal 11, the output voltage control transistor 18 is connected as is shown, while between the base and the collector of the transistor 18, the resistor 19 is connected. Between the negative side of the auxiliary power source 17 and the terminal 12 the output current detecting resistor 20 is connected, while between the both terminals of the resistor and the base of the transistor 18, the transistor 21 is connected as is shown in the drawing.
- the switch 16 is in the closed state and the auxiliary power source device 15 is controlled by means of the control circuit 14 in such a manner that the current flows from the plus side of the powder source 15 through the switch 16, the motor 13 and the control circuit 14 to the negative side of the power source 15, whereby the motor 13 carries out the winding operation.
- the auxiliary power source device 7 is mounted on the bottom surface of the motor driven camera 1, by bringing the guide pin 9 into the guide hole 3 and rotating the mounting screw 3 so as to be screwed into the tripod screw 2 of the motor driven camera 1. Then the fixed pin 10 depressed the movable pin 4 so as to open the switch, while the terminals 5 and 6 are electrically connected to the terminals 11 and 12 respectively.
- the driving power source 15 is connected in series to the auxiliary power source 17 and controlled by means of the control circuit 14 in such a manner that the current flows from the positive side of the power source through the terminal 12, the resistor 20, the power source 17, the transistor 18, the terminal 11, the terminal 5, the motor 13, the control circuit 14 and the negative side of the power source 15, whereby the motor 13 carries out the winding motion.
- the driving current of the motor namely the output current of the auxiliary power source becomes larger than a predetermined value
- the transistor 21 is brought into the closed state by means of the voltage difference between the both ends of the resistor. Then the potential at the base of the transistor 18 lowers and the voltage difference between the terminals 11 and 12 lowers.
- the motor 13 shows the characteristics E 1 in FIG. 1(a).
- FIG. 4 shows the motor driven camera and the auxiliary power source device.
- 1 is the motor driven camera in which the winding motor and the driving power source are built so as to carry out the winding operation by means of the motor.
- 2 is the tripod screw arranged on the bottom surface of the motor driven camera, 3 is the guide hole, 4 is the movable pin and 25, 26, 27 and 28 are the terminals to be connected to the auxiliary power source.
- 7 is the auxiliary power source device in which the auxiliary power source and the power source control circuit are built.
- 8 is the mounting screw for mounting the device on the motor driven camera, 9 is the guide pin, 10 is the fixed pin and 33, 34, 35 and 36 are the terminals to be electrically connected to the terminals of the motor driven camera respectively.
- 1 is the motor driven camera including the circuit at the side of the motor driven camera
- 7 is the auxiliary power source device including the circuit at the side of the auxiliary power source device
- 13 is the driving motor in the motor driven camera 1 to be controlled by means of the motor control circuit 22.
- 15 is the driving power source in the motor driven camera for supplying the current to the motor 13 and the control circuit 22 through the first switch 23.
- the first switch 23 is mechanically engaged with the second switch 24 connected between the motor 13 and the control circuit 22, whereby both of the switches are normally in the closed state and opened when the movable pin 4 is depressed.
- the auxiliary power source 17 is arranged.
- 29, 30 and 31 are the resistors, which make a bridge circuit with the motor 13 in the motor driven camera when the auxiliary power source device is mounted on the motor driven camera.
- 32 is the transistor connected at the neutral point between the resistors 29 and 30 and the resistor 31 and the terminal 35 so as to detect the power of the bridge circuit.
- 37 is the transistor which is connected between the terminals 33 and 34 as is shown in the drawing, and controls the voltage to be applied to the motor 13 in accordance with the output of the transistor 32.
- 38 is the condenser for actuating the transistor at the time of the start of the motor 13, and 39 and 40 are the resistors connected as is shown in FIG. 5.
- the driving power source 15 is controlled by means of the control circuit in such a manner that the current flows from the positive side of the power source 15, through the switch 23, the motor 13, the switch 24 and the control circuit 22 to the negative side of the power source 17, whereby the motor 13 carries out the winding motion.
- the auxiliary power source device 7 the device is mounted on the bottom surface of the motor driven camera 1 by bringing the guide pin 9 into the guide hole 3 and screwing the mounting screw 8 into the screw 2 in the tripod of the motor driven camera.
- the fixed pin 10 depresses the movable pin 4 and opens the first and the second switches 23 and 24, while the terminals 25, 26 27 and 28 are connected to the terminals 33, 34, 35 and 36, respectively.
- the driving power source 15 and the auxiliary power source 17 are connected in series to each other and controlled by the means of the control circuit 22 in such a manner that the current flows from the positive side of the power source 15 through the terminal 28, the terminal 36, the power source 17, the resistor 31, the terminal 35, the terminal 27, the motor 13, the terminal 25, the terminal 33, the transistor 37, the terminal 34, the terminal 26 and the control circuit 22 to the negative side of the power source 15, whereby the motor 13 carries out the winding operation of the camera.
- the terminal 26 in the control circuit is connected to the negative side of the driving power source 15 so as to bring the transistors 37 and 32 into the closed state.
- the motor 13 starts to run.
- the speed of the motor 13 is increased (about N 1 in FIG. 1) the impedance of the motor is increased.
- the emitter potential of the transistor 32 is fixed by means of the resistors 29 and 30, the output current of the transistor 32 decreases. Consequently, the base current of the transistor 37 decreases.
- the collector potential of the transistor 37 goes up so as to decrease the voltage applied to the motor 13.
- the above embodiments refer to the auxiliary power source device for the motor driven camera in which the motor is built, while it goes without saying that the present invention can be applied to the auxiliary power source device for the separate motor driven device.
- the starting torque and the starting current are not increased when the auxiliary power source is used so that the film is not damaged when the film is consumed and the speed of the motor does not become larger than a predetermined value in such a manner that the motor is not damaged and the winding speed and the shooting capacity can be increased.
- the control circuit for changing the motor characteristics can be installed in the auxiliary power source device so that the manufacturing cost of the motor driven camera does not become higher nor the size becomes larger.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Cameras Including Film Mechanisms (AREA)
Abstract
Description
I=C.sub.1 π+C.sub.2 ( 1)
N=C.sub.3 V-C.sub.4 τ (2)
N=C.sub.3 V-C.sub.4 (I-C.sub.2 /C.sub.2)=C.sub.3 V+C.sub.5 I+C.sub.6 (3)
N=C.sub.7 (constant) (4)
C.sub.3 V+C.sub.5 I+C.sub.6 =C.sub.7
V=-C.sub.8 I+C.sub.9 (5)
Claims (6)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2597281A JPS57139730A (en) | 1981-02-24 | 1981-02-24 | Auxiliary power supply device for motor-driven camera |
JP56-25972 | 1981-02-24 | ||
JP2597681A JPS57139731A (en) | 1981-02-24 | 1981-02-24 | Auxiliary power supply device for motor-driven camera |
JP56-25976 | 1981-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4427280A true US4427280A (en) | 1984-01-24 |
Family
ID=26363682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/349,458 Expired - Lifetime US4427280A (en) | 1981-02-24 | 1982-02-17 | Auxiliary power source device for motor driven camera |
Country Status (2)
Country | Link |
---|---|
US (1) | US4427280A (en) |
DE (1) | DE3206455A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5123079A (en) * | 1986-03-10 | 1992-06-16 | Minolta Camera Kabushiki Kaisha | DC motor and controlling system therefor |
US6101339A (en) * | 1998-04-10 | 2000-08-08 | Minolta Co., Ltd. | Camera and system operating from a secondary battery |
WO2000050955A1 (en) * | 1999-02-22 | 2000-08-31 | Welch Allyn, Inc. | Digital camera adaptor assembly |
US20040190889A1 (en) * | 2002-09-18 | 2004-09-30 | Nikon Corporation | Flash apparatus and auxiliary battery apparatus |
US20060093345A1 (en) * | 2004-11-02 | 2006-05-04 | Jan Michael S F | Positioning structure of emergency power supply for use in a camera device |
US20060145656A1 (en) * | 2004-12-28 | 2006-07-06 | Yoichi Miyajima | Power supply unit |
US7102686B1 (en) * | 1998-06-05 | 2006-09-05 | Fuji Photo Film Co., Ltd. | Image-capturing apparatus having multiple image capturing units |
US20070058075A1 (en) * | 2005-09-09 | 2007-03-15 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US20090002524A1 (en) * | 2005-09-09 | 2009-01-01 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US20120027396A1 (en) * | 2010-07-28 | 2012-02-02 | Sony Corporation | Electronic device, connection detection method and connection detection system |
US8804030B2 (en) | 2010-04-08 | 2014-08-12 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5755616Y2 (en) * | 1972-09-06 | 1982-12-01 | ||
US4091400A (en) * | 1977-01-10 | 1978-05-23 | Polaroid Corporation | Multiple battery camera |
-
1982
- 1982-02-17 US US06/349,458 patent/US4427280A/en not_active Expired - Lifetime
- 1982-02-23 DE DE19823206455 patent/DE3206455A1/en active Granted
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5123079A (en) * | 1986-03-10 | 1992-06-16 | Minolta Camera Kabushiki Kaisha | DC motor and controlling system therefor |
US6101339A (en) * | 1998-04-10 | 2000-08-08 | Minolta Co., Ltd. | Camera and system operating from a secondary battery |
US7102686B1 (en) * | 1998-06-05 | 2006-09-05 | Fuji Photo Film Co., Ltd. | Image-capturing apparatus having multiple image capturing units |
US20060268159A1 (en) * | 1998-06-05 | 2006-11-30 | Masaaki Orimoto | Image-capturing apparatus having multiple image capturing units |
US7667768B2 (en) | 1998-06-05 | 2010-02-23 | Fujifilm Corporation | Image-capturing apparatus having multiple detachably connectable image capturing units |
WO2000050955A1 (en) * | 1999-02-22 | 2000-08-31 | Welch Allyn, Inc. | Digital camera adaptor assembly |
US20040190889A1 (en) * | 2002-09-18 | 2004-09-30 | Nikon Corporation | Flash apparatus and auxiliary battery apparatus |
US6804461B1 (en) * | 2002-09-18 | 2004-10-12 | Nikon Corporation | Flash apparatus and auxiliary battery apparatus |
US20060093345A1 (en) * | 2004-11-02 | 2006-05-04 | Jan Michael S F | Positioning structure of emergency power supply for use in a camera device |
US7659691B2 (en) * | 2004-12-28 | 2010-02-09 | Sony Corporation | Power supply unit |
US20060145656A1 (en) * | 2004-12-28 | 2006-07-06 | Yoichi Miyajima | Power supply unit |
EP1952622A2 (en) * | 2005-09-09 | 2008-08-06 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US20090002524A1 (en) * | 2005-09-09 | 2009-01-01 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US20070058075A1 (en) * | 2005-09-09 | 2007-03-15 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US7724303B2 (en) * | 2005-09-09 | 2010-05-25 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US7864244B2 (en) | 2005-09-09 | 2011-01-04 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
EP1952622A4 (en) * | 2005-09-09 | 2011-12-14 | Bauer Anton Inc | Camera system and power supply for optical recording devices |
US8804030B2 (en) | 2010-04-08 | 2014-08-12 | Anton/Bauer, Inc. | Camera system and power supply for optical recording devices |
US20120027396A1 (en) * | 2010-07-28 | 2012-02-02 | Sony Corporation | Electronic device, connection detection method and connection detection system |
US8600225B2 (en) * | 2010-07-28 | 2013-12-03 | Sony Corporation | Electronic device, connection detection method and connection detection system |
Also Published As
Publication number | Publication date |
---|---|
DE3206455A1 (en) | 1982-10-28 |
DE3206455C2 (en) | 1989-06-22 |
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